Restricted to natural individuals or legal entities within The Principality of Andorra, or those who have been residents for at least 20 years. The domain name must be identical to the name registered at the Andorran Commerce Register or the Andorran trademark.

Registrations must be pre-approved by Office for State Emblems and Signs, are generally limited to residents of Andorra or Andorran trademark holders with an agent in Andorra, and the number of registrations per person is limited

.ad is the Internet country code top-level domain (ccTLD) for Andorra. It is administered by Servei de Telecommunicacions d'Andorra.

Names can be registered directly at the second level; third-level registrations under .nom.ad are used for personal sites

Registrations must be pre-approved by Office for State Emblems and Signs, are generally limited to residents of Andorra or Andorran trademark holders with an agent in Andorra, and the number of registrations per person is limited